Patents by Inventor Duane J. Rothacher

Duane J. Rothacher has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • High voltage level shift semiconductor device
    Patent number: 4890146
    Abstract: Disclosed is a semiconductor device implementing a resistor-load level shift circuit which avoids high voltage crossings of PN junctions by utilization of a combined drain resistor region and a unique circuit layout.
    Type: Grant
    Filed: December 16, 1987
    Date of Patent: December 26, 1989
    Assignee: Siliconix Incorporated
    Inventors: Richard K. Williams, Steven H. Bolger, Duane J. Rothacher